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3 years ago

Why do atoms form bonds or why do bonds form?

Chemistry

1 answer:

stiv31 [10]3 years ago

7 0

Answer:

Atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. A chemical bond is a force of attraction between atoms or ions

Explanation:

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Why is only 10% of energy transferred

Alex17521 [72]

Answer:

the rest is lost largely through metabolic processes as heat.

Explanation:

The amount of energy at each trophic level decreases as it moves through an ecosystem. As little as 10 percent of the energy at any trophic level is transferred to the next level;

6 0

3 years ago

A soda pop can filled with diet soda has a mass of 373 g and a volume of 381 mL. A soda pop can filled with regular soda has a m

fomenos

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4 years ago

Read 2 more answers

An acute triangle is a triangle with ___ angle each less than?

Reika [66]

Answer:

An acute triangle (or acute-angled triangle) is a triangle with three acute angles (less than 90°).

Explanation:

hope this helps

8 0

3 years ago

A first-order reaction has a half-life of 29.8 s . How long does it take for the concentration of the reactant in the reaction t

lutik1710 [3]

Answer : The time taken for the concentration of the reactant in the reaction to fall to one-fourth of its initial value is, 12.4 seconds.

Explanation :

Half-life = 29.8 s

First we have to calculate the rate constant, we use the formula :

$k=\frac{0.693}{t_{1/2}}$

$k=\frac{0.693}{29.8s}$

$k=0.0232s^{-1}$

Now we have to calculate the time passed.

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant = $0.0232s^{-1}$

t = time passed by the sample = ?

a = let initial amount of the reactant = x M

a - x = amount left after decay process = $x-\frac{1}{4}\times (x)=\frac{3}{4}\times (X)=\frac{3x}{4}M$

Now put all the given values in above equation, we get

$t=\frac{2.303}{0.0232s^{-1}}\log\frac{x}{(\frac{3x}{4})}$

$t=12.4s$

Therefore, the time taken for the concentration of the reactant in the reaction to fall to one-fourth of its initial value is, 12.4 seconds.

7 0

4 years ago

How many carbon atoms are there in a diamond (pure carbon) with a mass of 55 mg ?

kari74 [83]

1 mol of Carbon = 12 grams.
x mol of Carbon = 55 grams

12*x = 1 * 55
x = 55/12
x = 4.583333 mols of carbon

1 mol of anything is 6.02 * 10^23 atoms
4.58333333 mol = x

1/4.5833333 = 6.02 * 10^23/x
x = 4.58333* 6.02*10^23
x = 2.7591 * 10^23 Carbon atoms

3 0

3 years ago